Nitrogen fertilization stimulated soil heterotrophic but not autotrophic respiration in cropland soils: A greater role of organic over inorganic fertilizer

Chen, Zengming; Xu, Yehong; He, Yujie; Zhou, Xuhui; Fan, Jianling; Yu, Haiying; Ding, Weixin

doi:10.1016/j.soilbio.2017.10.029

Cited by 66 publications

(45 citation statements)

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“…Annual Ra was found to be lowest in HRAS, which also had lower Rh in comparison to other compost treatments (Figure ). Our previous studies (Chen et al, , ) found that in contrast to Rh, Ra was more dominantly controlled by mineral N than C supply. Consistently, in the current study, the change was more significant in Ra than Rh by the change in mineral N supply in the UREA treatment, while the opposite was true for the treatments receiving compost with various qualities (Figure ).…”

Section: Discussionmentioning

confidence: 81%

“…The static closed chamber method was employed to measure soil CO 2 fluxes from 16 May 2012 to 14 May 2013. The Rs components were partitioned by the commonly used root exclusion method, which was implemented by not sowing the maize crop (Chen et al, , ). Ra was determined as the difference between Rs and Rh that was measured from the planted and unplanted area, respectively (Suleau et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…Cumulative emission was calculated by linear interpolation between sampling occasions. Detailed descriptions of chamber design and gas sampling have been given previously (Chen et al, , ).…”

Section: Methodsmentioning

confidence: 99%

“…The percentage of compost C mineralized ( C min , %) was estimated by (Chen et al, )

C_{\min} = ([], {Rh}_{compost} - 0.5 \times ((), {Rh}_{UREA} - {Rh}_{CONT}) - {Rh}_{CONT}) / C_{compost} \times 100 %

where Rh compost , Rh UREA , and Rh CONT are the cumulative Rh (g C m −2 ) in the compost treatment, UREA, and CONT, respectively; 0.5 is the ratio of urea‐N application rate in the compost treatment to that of the UREA treatment; and C compost is the amount of organic C input by compost application. This calculation was based on the assumptions that the priming effect induced by OM addition on SOC decomposition is negligible (Johnson et al, ; Niknahad‐Gharmakher et al, ) and that Rh from SOC decomposition was assumed to respond proportionally to N rate at the range of 100–200 kg N ha −1 (Zhong et al, ).…”

Section: Methodsmentioning

confidence: 99%

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Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Chen

Castellano

et al. 2019

JGR Biogeosciences

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Understanding autotrophic (Ra) and heterotrophic (Rh) components of soil respiration (Rs) and their temperature sensitivity (Q10) is critical for predictingsoil carbon (C) cycle and its feedback to climate change. In agricultural systems, these processes can be considerably altered by chemical fertilizer and compost application due to changes in nitrogen (N) supply and substrate quality (decomposability). We conducted a field experiment including control, urea, and four compost treatments. Ra and Rh were separated using the root exclusion method. Composts were characterized by chemical analyses, 13C solid‐state nuclear magnetic resonance, and lignin monomers. Annual cumulative Ra, along with root biomass, increased with soil mineral N, while Rh was suppressed by excessive N supply. Thus, Ra was stimulated but Rh was decreased by urea alone application. Annual Rh was increased by application of compost, especially that containing most lignin vanillyl and syringyl units, O‐alkyl C, di‐O‐alkyl C, and manganese. However, during the initial period, Rh was most effectively stimulated by the compost containing most carbohydrates, lignin cinnamyl units, phenolic C, and calcium. Ra was mediated by N release from compost decomposition and thus exhibited similar responses to compost quality as Rh. The Rh Q10 was reduced, while Ra Q10was increased by chemical fertilizer and compost application. Moreover, the Rh Q10 negatively related to soil mineral N supply and compost indicators referring to high substrate quality. Overall, our results suggest that N supply and substrate quality played an important role in regulating soil C flux and its response to climate warming.

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Section: Discussionmentioning

confidence: 81%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The percentage of compost C mineralized ( C min , %) was estimated by (Chen et al, )

C_{\min} = ([], {Rh}_{compost} - 0.5 \times ((), {Rh}_{UREA} - {Rh}_{CONT}) - {Rh}_{CONT}) / C_{compost} \times 100 %

Section: Methodsmentioning

confidence: 99%

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Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Chen

Castellano

et al. 2019

JGR Biogeosciences

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“…A atividade microbiológica é um indicador da qualidade dos solos agrícolas, a qual depende dentre outros fatores, da disponibilidade de N, proveniente da degradação da matéria orgânica do solo (Chen et al, 2018) (Chen et al, 2018;Singh et al, 2011), o que aumentou a população microbiana, como sugere o pico da respirometria quatro dias após a adição de N.…”

Section: N-fertilizante Altera a Atividade Microbiana Na Superfície Dunclassified

Nitrogênio em profundidade - imobilização e recuperação pelo milho

Richart¹

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Nitrogênio em profundidadeimobilização e recuperação pelo milho / Aline Cristina Richart -versão revisada de acordo com a resolução CoPGr 6018 de 2011, --Piracicaba, 2018. p.Dissertação (Mestrado) -USP / Escola Superior de Agricultura "Luiz de Queiroz".1. Desidrogenase 2. Isótopo 15 N 3. Profundidade de fertilização 4. Respirometria 5. Sistema solo-milho 6. Zea mays L. I. Título AGRADECIMENTOS Agradeço primeiramente à Deus, pelo dom da vida, pela minha família, por dar-me saúde, força de vontade, fé e sabedoria, que possibilitaram a realização de todas as conquistas durante o mestrado.Aos meus pais, Alda e Antônio Richart por me educarem e por sempre me darem apoio, incentivo e conselhos para que eu pudesse superar as dificuldades e obstáculos, permitindo que conquistasse mais essa etapa.Aos meus irmãos Fabiano e Maicon Richart pela motivação, discussões e troca de ideias ao longo de mais essa caminhada, pela nossa união e momentos de alegria que passamos juntos todos esses anos.Ao professor Dr. José Laércio Favarin pela orientação, estímulo, confiança, compreensão e orientação em todas as etapas dessa pesquisa, por ter acreditado no meu trabalho e nos meus conhecimentos.A Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) pela bolsa concedida de mestrado. À Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ-USP) pela excelência de ensino e infraestrutura, ao programa de Pós-Graduação em Fitotecnia, e ao departamento de Produção Vegetal da ESALQ/USP, pelo apoio técnico, científico, material e estrutural em todas as fases do curso, que por meio de seus professores e funcionários, possibilitaram a realização do curso de mestrado. A todo o corpo docente pelos ensinamentos, proporcionando a oportunidade de crescimento pessoal e profissional. A secretária do programa de Fitotecnia Luciane, pelas palavras de apoio, conselhos.Aos colegas de pós-graduação Laskou, Renan, Pakitão e Vitrola pela colaboração no campo, pelas discussões sobre a pesquisa executada e pelo crescimento pessoal. Com certeza as viagens para Taquarituba e Leme ficaram mais divertidas e menos cansativas com nosso companheirismo e amizade.Agradeço ao Bruno Cocco Lago, pelo companheirismo, paciência nos momentos difíceis, atenção e palavras de carinho infindáveis, meus sinceros agradecimentos.Agradeço ao Dipé, Thalita, Bobodá, Spiga, Txarli, Kaskta, Tchê, Frida, Mar 2 one, Paraguaio e Moscardinha, Ana, Jack, pelo companheirismo, paciência, amizade e momentos de descontração, obrigada pelas discussões que nos fizeram crescer e aprender juntos.Ao professor Dr. Paulo César Ocheuze Trivelin pelo auxílio nas análises laboratoriais, pelas discussões dos dados e ensinamentos transmitidos, proporcionando aprendizado.Ao Centro de Energia Nuclear na Agricultura -Laboratório de Isótopos Estáveis (LIE-CENA) pela colaboração na análise das amostras. A equipe do LIE-CENA, Hugo H. Batagello, Ana Paula G. de M. Duarte, Miguel Luiz Baldessin, José Aurélio Bonassi pelo auxílio nas atividades laboratoriais, ensinamentos e amizade compartilhados. Ao L...

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Soil temperature and bacterial diversity regulate the impact of irrigation and fertilization practices on ecosystem respiration

et al. 2021

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Understanding ecosystem respiration (R eco ) response to various management practices is important for the sustainable development of solar greenhouse systems, which represent a large and profitable industry in Northwest China. A tomato (Lycopersicon esculentum Mill.)-cucumber (Cucumis sativus L.)-tomato rotation experiment was conducted with four treatments including two irrigation levels (regular irrigation [RI] and low irrigation [LI]) and two N fertilizer sources (organic-N fertilizer [N1] and inorganic-N fertilizer [N2]). Ecosystem respiration and soil variables were measured multiple times. Mean R eco flux was 511, 319, and 437 mg m -2 h -1 for tomato-2016, cucumber-2016, and tomato-2017, respectively. Soil temperature was the most important factor affecting R eco magnitude. Tomato seasons with higher temperature had significantly greater R eco flux than the cucumber season. Organic-N fertilizer application can stimulate R eco flux, cumulative R eco , and R eco intensity mainly by providing favorable soil N and C condition for soil bacterial growth and activity, whereas the difference between irrigation levels was inconsistent. The fitted exponential function describing the relationship between R eco and soil temperature showed that the temperature sensitivity decreased from tomato-2016 to tomato-2017 for all treatments, corresponding to the continuously reduced soil bacterial alpha diversity. Soil bacterial Shannon index was an effective prediction factor for R eco in the relatively warmer and drier season, with an R 2 >.8 during tomato-2017. The RIN1 treatment consistently had the greatest cumulative R eco and the highest soil bacterial alpha diversity throughout the rotation. Further studies are needed on the mechanisms of how the change of soil properties would regulate the response of R eco to soil abiotic and biotic factors.

show abstract

Nitrogen fertilization stimulated soil heterotrophic but not autotrophic respiration in cropland soils: A greater role of organic over inorganic fertilizer

Cited by 66 publications

References 64 publications

Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Soil Respiration Components and their Temperature Sensitivity Under Chemical Fertilizer and Compost Application: The Role of Nitrogen Supply and Compost Substrate Quality

Nitrogênio em profundidade - imobilização e recuperação pelo milho

Soil temperature and bacterial diversity regulate the impact of irrigation and fertilization practices on ecosystem respiration

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